I had a Gerber Multiplier once. The phillips head twisted while I was trying to remove a screw from an aircraft panel. I got a real screwdriver, and was surprised to find that it wasn't that tight. I took the Gerber back.
Now I have a Leatherman Supertool (the first model), and a SOG PowerPlier. I like both, but if forced to choose, it would be the SOG.
Once, I had to cut a door chain with the wirecutters on the SOG. I was locked out, and only had a key for the door that was chained. I was sure that the tool would break while attempting this, and it did hurt my hands to do it, but the SOG came through.
My experience has been that no tool has all the features/tools that I want, I bet almost everyone here can relate to this. I love the SOG, but the tools don't lock, etc.
Someone should make a custom multitool, where you select the tools/blades, and their arrangement in the multitool. Have you ever seen one and thought "This would be perfect if there were scissors where this saw is.", or something like that?
However, I carry neither anymore. They just sit in a drawer. I can't use personal tools at work, and when I'm out, I frequently carry my Proteus pack, in which I keep a Victorinox Work Champ, and on my keys I have a Leatherman Squirt P4, and Spyderco Jester.